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Course Outline

Introduction

Cluster Setup

  • Apply network security policies to restrict cluster-level access
  • Use the CIS benchmark to review the security configuration of Kubernetes components (etcd, kubelet, kube-dns, kube-apiserver)
  • Correctly configure Ingress objects with appropriate security controls
  • Protect node metadata and endpoints
  • Minimize the use of and access to GUI elements
  • Verify platform binaries before deployment

Cluster Hardening

  • Restrict access to the Kubernetes API
  • Utilize Role-Based Access Controls (RBAC) to minimize exposure
  • Exercise caution when using service accounts (e.g., disable defaults, minimize permissions on newly created accounts)
  • Keep Kubernetes updated regularly

System Hardening

  • Minimize the host operating system footprint to reduce the attack surface
  • Limit IAM roles
  • Minimize external network access
  • Properly utilize kernel hardening tools such as AppArmor and seccomp

Minimize Microservice Vulnerabilities

  • Configure appropriate OS-level security domains (e.g., using PSP, OPA, security contexts)
  • Manage Kubernetes secrets effectively
  • Employ container runtime sandboxes in multi-tenant environments (e.g., gVisor, Kata Containers)
  • Implement pod-to-pod encryption using mTLS

Supply Chain Security

  • Minimize the base image footprint
  • Secure your supply chain: whitelist allowed image registries, sign and validate images
  • Perform static analysis of user workloads (e.g., Kubernetes resources, Dockerfiles)
  • Scan images for known vulnerabilities

Monitoring, Logging, and Runtime Security

  • Conduct behavioral analytics of syscall, process, and file activities at both the host and container levels to detect malicious behavior
  • Identify threats across physical infrastructure, applications, networks, data, users, and workloads
  • Detect all phases of an attack regardless of origin or propagation method
  • Perform in-depth analytical investigations to identify bad actors within the environment
  • Ensure container immutability at runtime
  • Utilize Audit Logs to monitor access

Summary and Conclusion

Requirements

  • CKA (Certified Kubernetes Administrator) certification

Audience

  • Kubernetes practitioners
 21 Hours

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